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Spare Parts

Spare Parts And Repair Kits For Diaphragm Pumps

This page lists spare parts and repair kits for Nuodean AODD pumps and for pumps from ARO, Wilden, Graco and Sandpiper brands. Each kit is identified by the model code of the pump it fits. Air section and fluid section kits are available, each with an exploded drawing and a numbered part list. Plants use these to maintain uptime and reduce repair time. The parts are not branded replacements but are built to fit and function in the same way.

Series	Spare Parts For Diaphragm Pumps
Wetted body material	See data sheet

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Key Benefits

What Repair Kits Buy You

Having the right spare parts on hand keeps a pump running through a failure and avoids long downtime.

No More Waiting For A Part

With the model code, you can order the exact kit or part that fits your pump. The exploded drawing shows every component, so you know what to expect before you open the box.

Faster Repairs With Clear Part Lists

Each kit comes with a numbered part list and an exploded drawing. That means you can identify the worn part and replace it without guessing or searching online.

Consistent Fit Across Brands

The kits are built to fit ARO, Wilden, Graco and Sandpiper pumps, not just Nuodean. The dimensions and port positions match, so the repair is a drop-in fix.

No Need To Hold Every Part

A single repair kit covers the most common wear items. For example, the DP31-Air50 kit includes the air valve, pilot valve, seals and springs. You don't need to stock every small part separately.

No Risk Of Wrong Material

The model code sets the diaphragm, ball and seat material. You get the right elastomer for your fluid, not a generic one that fails early.

No Need To Match Old Parts

You don't need to send in a worn part. Just give the model code and the fluid type. We supply the correct kit, not a guess.

Who It Is For

Who Buys These Kits

Plants that keep pumps running through failures buy these kits. They are not for first-time buyers or those replacing a pump with a new model.

Maintenance teams who repair AODD pumps on site and want to avoid delays
Facilities that run multiple brands of AODD pumps and need a single source for spares
OEMs who build machines with AODD pumps and need a repair option for their customers
Contractors who carry a few kits on a service truck and fix pumps in the field
Factories that have a pump failure and need to get back online in under an hour

Problems It Solves

Problems These Kits Are Bought To Fix

Every enquiry for a repair kit starts with a pump that failed in one of these ways.

A pump stops because the diaphragm is torn, and a fluid section kit lets you replace it in under 30 minutes
The air valve sticks and the pump runs slow, so the air section kit gives a full valve and seal replacement
The ball check is worn and leaks, and the kit includes a new ball and seat that match the model code
A plant runs three different brands of AODD pumps and has no central spares list, so the model code system brings order
A pump fails at a remote site and the only spare is a generic part that doesn't fit, so the correct kit avoids a delay

Application Scenarios

Where These Kits Are Used

01

On-Site Pump Repair

A maintenance team opens the pump, checks the model code, orders the kit, and replaces the worn parts in a single shift.

02

Field Service Truck

A technician carries a few repair kits in the van and fixes a pump on the spot without sending it back to the shop.

03

Multi-Brand Pump Fleet

A plant uses ARO, Wilden and Nuodean pumps. The model code system lets them use one spares list for all.

04

OEM Support

An OEM includes a repair kit in the machine box so the customer can fix the pump without calling service.

Technical Features

How The Kits Are Built

Each kit is built around the model code and comes with documentation to make the repair fast and correct.

Model Code Driven
The model code sets the fluid caps, center body, diaphragm, ball, seat, air valve and seals. You get exactly what fits your pump.
Exploded Drawings With Part Numbers
Each kit has an exploded drawing and a numbered part list. You can see every component and match it to the worn part.
Air Section And Fluid Section Kits
Two kit types are available. The air section kit includes the air valve, pilot valve, seals and springs. The fluid section kit includes the diaphragm, ball, seat and hardware.
No Brand Confusion
The kits are not branded. They are built to fit ARO, Wilden, Graco and Sandpiper pumps, but they are not the original brand parts.
No Guesswork On Materials
The model code sets the elastomer. You get the right diaphragm and ball for your fluid, not a generic one.
No Need To Send In Parts
You don't need to send a worn part. Just give the model code and the fluid. We supply the correct kit.

Specifications

Published Performance

Nuodean does not publish a performance table for this item. Send us the duty and we will confirm what applies.

Materials

Material Options

Set in the model code. The diaphragm, ball, seat and seals are chosen at the time of order.

Wetted materials	Confirmed against your fluid before build

Performance figures are transcribed from the Nuodean data sheet for this pump. Flow is measured at the pump discharge with water at ambient temperature; your duty point depends on air supply pressure, suction conditions, fluid viscosity and discharge head. Ask our engineers to confirm the duty point before you order.

Quality Control

Before It Is Crated

Each kit is checked against the model code before packing
The exploded drawing and part list are included with every kit
The kit is packed to prevent damage in transit
The kit is shipped with the model code clearly marked

Customization

What You Can Change

Diaphragm material in neoprene, nitrile, Viton, PTFE with Santoprene backing, EPDM, acetal, Hytrel or Santoprene
Ball check material in neoprene, nitrile, Viton, PTFE, EPDM, acetal, polyurethane, stainless steel, Hytrel or Santoprene
Seat material in aluminum, 316 stainless steel, PVDF, carbon steel, hard stainless steel, Santoprene, Hytrel or nitrile
Air valve and pilot valve seals in ceramic or elastomer
Hardware in stainless steel or carbon steel
Thread type in NPT or BSP

Comparison

Against The Alternatives

Where these kits win and where a different option is better.

Versus buying generic parts from a third party	Generic parts may not fit or fail early. These kits are built to the model code and include the correct materials and dimensions.
Versus ordering parts from the original brand	Original brand parts are more expensive and take longer to deliver. These kits are faster and cheaper, with the same fit and function.
Versus replacing the whole pump	A new pump costs more and takes longer to install. A repair kit gets the pump back online in hours, not days.
Versus the 2 inch triple diaphragm pump	The triple pump gives higher pressure and is used for spraying and long lines. This kit is for repair, not for new duty. Choose the triple pump when you need pressure, not when you need a spare.
Versus the 3 inch aluminum pump	The 3 inch pump gives more flow and passes larger solids. This kit is for repair, not for upgrading. Choose the larger pump when you need volume, not when you need a spare.

Use Guide

Getting The Best Out Of The Kits

Five things that decide whether the repair takes 10 minutes or 2 hours.

Use The Model Code
The model code is the only way to get the right kit. Do not guess. Use the code from the pump nameplate or the data sheet.
Check The Elastomer
The diaphragm and ball material must match your fluid. PTFE with Santoprene backing for acids, Viton for hot oils, nitrile for petroleum.
Read The Exploded Drawing
Before you start, look at the exploded drawing. It shows how the parts go together and what the part numbers are.
Keep The Kit Sealed
Store the kit in a dry place. The seals and diaphragms can degrade if exposed to heat or sunlight.
Stock The Two Kits
Keep one air section kit and one fluid section kit for each pump model. That way, you can replace the most common wear parts in a single repair.

Answers

Spare Parts And Repair Kits For Diaphragm Pumps FAQ

What is the model code?

The model code is a string of letters and numbers on the pump nameplate. It identifies the pump's materials, port size and configuration. Use it to order the correct kit.

Can I use this kit on a Wilden pump?

Yes. The kit is built to fit Wilden pumps, but it is not a genuine Wilden part. It is made to the same dimensions and function.

Do you have a kit for a 1 inch AODD pump?

Yes. The DP3X and WA series include 1 inch pumps. Each has a repair kit identified by the model code. Check the series catalogue for the code.

What if I don't know the model code?

Send a photo of the pump nameplate and the fluid type. We will identify the code and send the correct kit. You don't need to send the pump.

How do I know which kit I need?

The air section kit covers the air valve, pilot valve and seals. The fluid section kit covers the diaphragm, ball and seat. Choose based on which part is worn.

Are the parts the same as the original brand?

They are built to the same dimensions and function. They are not the original brand parts, but they fit and work the same way.

Can I buy just one part?

Yes. Individual parts are available. Just give the model code and the part number from the exploded drawing. We will send the exact part.